I´m trying to compare two fingerprint in java using DigitalPersona SDK v 3.0.0, but I geeting FMD is Invalid Error or sometimes I get One or more parameters passed to the API call are invalid.
I have a png image obtained from Javascript API and I tried to create a FID then a FDM like in this post
example
But I don´t know how to get the method params: inDpi, fingerPosition, cbeffId, outDpi and rotate180 to get de Fid
Fid fid = UareUGlobal.getImporter().ImportRaw(rawPixels,
width, height, inDpi, fingerPosition, cbeffId,
Fid.Format.ANSI_381_2004, outDpi, rotate180);
also I had tried ImportFmd using intermediate format without success
Any help will be apreciated
This code worked for me as on digital persona 4500 model.
private boolean ProcessCaptureResult(CaptureThread.CaptureEvent evt) throws IOException{
boolean bCanceled = false;
// CaptureThread.CaptureEvent evt = evt;
if(null != evt.capture_result){
System.out.println("This is Processing Capture");
if(null != evt.capture_result.image && Reader.CaptureQuality.GOOD == evt.capture_result.quality){
//extract features
Engine engine = UareUGlobal.GetEngine();
try{
Fmd fmd = engine.CreateFmd(evt.capture_result.image,
Fmd.Format.ISO_19794_2_2005;
BufferedImage img=ImageIO.read(new File("C:\\Users\\User\\Documents\\NetBeansProjects\\FingerPrintApp\\MembersImages","imag6.jpg"));
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageIO.write( img, "jpg", baos );
baos.flush();
byte[] imageInByte = baos.toByteArray();
baos.close();
// Fmd fmd1 = engine.CreateFmd(img, 0xa, 0xa, 0x14, Fmd.Format.ANSI_378_2004);
Fmd fmd2=UareUGlobal.GetEngine().CreateFmd(
toBytes(img),
img.getWidth(),
img.getHeight(),
500, 0, 3407615, Fmd.Format.ISO_19794_2_2005
);
System.out.println("Resulotion: "+evt.capture_result.image.getImageResolution()); ;
System.out.println("ID : "+evt.capture_result.image.getCbeffId()); ;
System.out.println(evt.capture_result.image.getData());
// if(null == m_fmds[0])
m_fmds[0] = fmd;
// else if(null == m_fmds[1])
m_fmds[1] = fmd2;
}
catch(UareUException e){ System.out.println("Engine.CreateFmd() "+e.getMessage()); }
// if(null != m_fmds[0] && null != m_fmds[1]){
//perform comparison
try{
System.out.println(m_fmds[0].getFormat().name());
int falsematch_rate = engine.Compare(m_fmds[0], 0, m_fmds[1], 0);
int target_falsematch_rate = Engine.PROBABILITY_ONE / 100000; //target rate is 0.00001
if(falsematch_rate < target_falsematch_rate){
System.out.println("Fingerprints matched.\n");
String str = String.format("dissimilarity score: 0x%x.\n", falsematch_rate);
System.out.println(str);
str = String.format("false match rate: %e.\n\n\n", (double)(falsematch_rate / Engine.PROBABILITY_ONE));
System.out.println(str);
}
else{
System.out.println("Fingerprints did not match.\n\n\n");
}
}
catch(UareUException e){ System.out.println("Engine.CreateFmd()"+ e.getMessage()); }
//discard FMDs
m_fmds[0] = null;
m_fmds[1] = null;
//the new loop starts
System.out.println(m_strPrompt1);
// }
// else{
// //the loop continues
// System.out.println(m_strPrompt2);
// }
}
else if(Reader.CaptureQuality.CANCELED == evt.capture_result.quality){
//capture or streaming was canceled, just quit
bCanceled = true;
}
else{
//bad quality
MessageBox.BadQuality(evt.capture_result.quality);
}
}
else if(null != evt.exception){
//exception during capture
MessageBox.DpError("Capture", evt.exception);
bCanceled = true;
}
else if(null != evt.reader_status){
//reader failure
MessageBox.BadStatus(evt.reader_status);
bCanceled = true;
}
return !bCanceled;
}
public static byte[] toBytes(BufferedImage image) {
WritableRaster raster = image.getRaster();
DataBufferByte data = (DataBufferByte) raster.getDataBuffer();
return (data.getData());
}
Well, I currently working on that one too. UareU SDK V3.0.0,
But I have problem with Verify and Compare feature.
However, to answer your question, In case you have a fingerprint image,
You can import image into Fmd directly. I meant this (I use ISO standard):
Fmd fmd = UareUGlobal.GetEngine().CreateFmd(bInput, 500, 550, 700, 0, 0, Fmd.Format.ISO_19794_2_2005)
Then, you can do compare or verify directly with this fmd.
Note: with, height, resolution must be changed according to your image and reader.
cbeffid parameter, I have tried 0 and 1.
If any one found the right answer for this parameter, please suggest me as well.
CBEFF
error
API call are invalid
Mostly, I found the resolution, fingerprint format and finger position param is in correct. fingerprint param, I usually set to 0 (first finger or first view)
Update
If you are using javascript. I would recommend you to convert base64 string from javascript to bufferedImage first.
public static Fmd importImageString(String image) throws UnsupportedEncodingException, IOException, UareUException {
byte[] bytes = Base64.getDecoder().decode(image.getBytes("UTF-8"));
if (null != bytes && bytes.length > 0) {
ByteArrayInputStream stream = new ByteArrayInputStream(bytes);
BufferedImage buf = ImageIO.read(stream);
if (null != buf) {
return UareUGlobal.GetEngine().CreateFmd(
TestDPuareU.toBytes(buf),
buf.getWidth(),
buf.getHeight(),
500, 0, 1, Fmd.Format.ISO_19794_2_2005
);
}
}
return null;
}
public static byte[] toBytes(BufferedImage image) throws IOException {
WritableRaster raster = image.getRaster();
DataBufferByte data = (DataBufferByte) raster.getDataBuffer();
return (data.getData());
}
The image I got it from javascript (var finger) sdk.onSamplesAcquired = function (s) like below
var samples = JSON.parse(s.samples);
var finger = Fingerprint.b64UrlTo64(samples[0])
Something like this is how you obtain those values, BUT Im getting the same error PID IS INVALID,so good luck and WHETHER you have the answer I hope you share it, regards.
m_fmd = m_engine.CreateFmd(cap_result.image, Fmd.Format.ANSI_378_2004);
data = m_fmd.getData();
width = m_fmd.getWidth();
height = m_fmd.getHeight();
resolution = m_fmd.getResolution();
finger_position = m_fmd.getCaptureEquipmentCompliance();
cbeff_id = m_fmd.getCbeffId();
format = m_fmd.getFormat();
